需要帮助才能使用xpath和xpathall读取嵌套/多次出现的xml标记示例：

<ProductInfo>
 <code>100</code>
 <entryInfo> 
    <statusCode>10</statusCode>
    <startTime>11</startTime>
    <endTime>12</endTime>
 </entryInfo> 
 <entryInfo>
    <statusCode>20</statusCode>
    <startTime>21</startTime>
    <endTime>22</endTime>
    <strengthValue>23</strengthValue>
    <strengthUnits>24</strengthUnits>
 </entryInfo>
 <entryInfo>
    <statusCode>30</statusCode>        
    <endTime>32</endTime>
    <strengthValue>33</strengthValue>
    <strengthUnits>34</strengthUnits>
    <extra>35</extra>
 </entryInfo>  
</ProductInfo>

预期产量：100,10,11,12，，，，，20,21,22,23,24,30,32,33,34,35
读取entryinfo和child标记的第一个匹配项时，xpath将转到$0的第二个匹配项以查找缺少的标记

XPathAll(x,’ProductInfo/entryInfo/statusCode’).$0,
XPathAll(x,’ProductInfo/entryInfo/startTime’).$0,
XPathAll(x,’ProductInfo/entryInfo/endTime’).$0,
XPathAll(x,’ProductInfo/entryInfo/strengthValue’).$0,
XPathAll(x,’ProductInfo/entryInfo/strengthUnits’).$0,
XPathAll(x,’ProductInfo/entryInfo/extra’).$0

输出；10,11,12,23,24,36